GPT-6 Luna vs Step 5 Preview
Pick a route and service tier under each model. Prices, the calculator and the verdicts follow your choice.
At a glance
Generated from the rows below
Choose GPT-6 Luna for
- The lowest cost per typical request ($0.0002)
- The largest context window: 1,050,000 tokens
Choose Step 5 Preview for
- The only one that takes video
- The longest output: 1,000,000 tokens
- The most routes on Phaseo: 3
Overview
Pricing
Prices on the route and tier chosen under each model
What will it cost?
Estimate a month of requests on the route and tier chosen for each model
Uses the route and tier chosen under each model, over 30 days. Cached input is billed at the cache-read rate.
Performance
Live gateway traffic
Activity
Tokens sent through Phaseo each day over the last 30 days
- Input
- Output
- Reasoning
153Ktokens, last 30 days
- Input
- 145K
- Output
- 6.59K
- Reasoning
- 957
- Requests
- 239
170tokens, last 30 days
- Input
- 87
- Output
- 32
- Reasoning
- 51
- Requests
- 2
Features
Features from the parameters Phaseo routes support
Benchmarks
Only results that two or more of the selected models report get a row
Artificial Analysis Intelligence Index Independent
Higher is better · at Max effort · 1 of 2 models tested
Where they rank
The five leaders on each capability index, then the compared models. Each model at its best-scoring setting.
Artificial Analysis Intelligence Index42 models ranked
- #1Claude Opus 5.558.4
- #2GPT-6 Astra56.9
- #3GPT-6.1 Sol54.5
- #4Claude Sonnet 5.554.2
- #5GPT-6.1 Terra51.0
- #21Step 5 Preview28.5
- #22GPT-6 Luna27.8
Epoch Capabilities Index164 models ranked
- #1GPT-6 Astra169.1
- #2Claude Opus 5.5168.4
- #3GPT-6.1 Terra168.1
- #4GPT-6.1 Sol167.8
- #5Claude Sonnet 5.5166.7
- #27GPT-6 Luna156.8
Lab-reported results come from each lab’s own launch materials and may use different settings. Independent results come from third-party evaluators.
Providers
Routes Phaseo serves today, standard-tier prices per 1M tokens
| Provider | Input | Output | Cache read | Context window | Max output | Tiers |
|---|---|---|---|---|---|---|
 | $0.10 | $0.00 | $0.50 | 1,050,000 | 128,000 | Standard, Batch, Flex, Priority |
 | $0.10 | $0.50 | $0.01 | 922,000 | 128,000 | Standard |
- OpenAI
- Input
- $0.10
- Output
- $0.00
- Context window
- 1,050,000
Standard, Batch, Flex, Priority
- Inference.net
- Input
- $0.10
- Output
- $0.50
- Context window
- 922,000
Standard
Standard-tier prices. The first row is the cheapest route; pick another under the model’s name at the top.
Also listed, not routed by Phaseo: 5 providers
Azure, Kilo Gateway, NanoGPT, OpenRouter, ZenMux
Shown for reference: other gateways’ listings and routes Phaseo has retired or disabled.
Details
GPT-6 Luna vs Step 5 Preview: side-by-side summary
GPT-6 Luna and Step 5 Preview are both available through the Phaseo API, so switching between them is a change of model id rather than a new integration.
GPT-6 Luna is from OpenAI. It has a 1,050,000-token context window. On its cheapest route it costs $0.10 per 1M input tokens and $0.00 per 1M output tokens.
Step 5 Preview is from StepFun. It has a 1,000,000-token context window. On its cheapest route it costs $1.00 per 1M input tokens and $2.70 per 1M output tokens.
GPT-6 Luna model details, providers and pricingStep 5 Preview model details, providers and pricing
GPT-6 Luna vs Step 5 Preview at a glance
| Attribute | GPT-6 Luna | Step 5 Preview |
|---|---|---|
| Lab | OpenAI | StepFun |
| Input price per 1M tokens | $0.10 | $1.00 |
| Output price per 1M tokens | $0.00 | $2.70 |
| Context window | 1,050,000 tokens | 1,000,000 tokens |
| Max output | 128,000 tokens | 1,000,000 tokens |
| Artificial Analysis Intelligence Index | 27.8 (#22) | 28.5 (#21) |
Prices are each model's cheapest standard route on Phaseo. Benchmark ranks use each model's best-scoring evaluated setting.
Frequently asked questions
Which is cheaper, GPT-6 Luna or Step 5 Preview?
GPT-6 Luna is cheaper for both input and output tokens. GPT-6 Luna costs $0.10 per 1M input tokens and $0.00 per 1M output tokens; Step 5 Preview costs $1.00 and $2.70, each on its cheapest standard route on Phaseo.
Which has the longer context window, GPT-6 Luna or Step 5 Preview?
GPT-6 Luna has the longer context window at 1,050,000 tokens, compared with 1,000,000 tokens for Step 5 Preview.
Which scores higher on the Artificial Analysis Intelligence Index, GPT-6 Luna or Step 5 Preview?
Step 5 Preview scores higher on the Artificial Analysis Intelligence Index. Step 5 Preview scores 28.5, ranked #21 of 42. GPT-6 Luna scores 27.8, ranked #22 of 42.
Can I use GPT-6 Luna and Step 5 Preview through one API?
Yes. Both are served through the Phaseo API, so you can switch between them by changing the model id.